[1]童 帅,贾书君,刘清友,等.X80自保护药芯焊丝半自动焊焊缝夹杂物特征分析[J].焊管,2019,42(9):12-19.[doi:10.19291/j.cnki.1001-3938.2019.9.003]
 TONG Shuai,JIA Shujun,LIU Qingyou,et al.Characteristic Analysis of Inclusions in Semi-automatic Weld of X80 Self-shielded Flux-cored Wire[J].,2019,42(9):12-19.[doi:10.19291/j.cnki.1001-3938.2019.9.003]
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X80自保护药芯焊丝半自动焊
焊缝夹杂物特征分析
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《焊管》[ISSN:1001-3938/CN:61-1160/TE]

卷:
42
期数:
2019年第9期
页码:
12-19
栏目:
试验与研究
出版日期:
2019-09-28

文章信息/Info

Title:
Characteristic Analysis of Inclusions in Semi-automatic Weld of
X80 Self-shielded Flux-cored Wire
文章编号:
10.19291/j.cnki.1001-3938.2019.9.003
作者:
童 帅1贾书君1刘清友1隋永莉2
1. 钢铁研究总院工程用钢研究所, 北京 100081;
2. 中国石油天然气管道科学研究院, 河北 廊坊 065000
Author(s):
TONG Shuai1 JIA Shujun1 LIU Qingyou1 SUI Yongli2
1. Central Iron and Steel Research Institute, Institute for Engineering Steel, Beijing 100081, China;
2. Pipeline Research Institute of China National Petroleum Corporation, Langfang 065000, Hebei, China
关键词:
X80自保护药芯焊丝半自动焊夹杂物焊缝韧性
Keywords:
X80 flux-cored wire semi-automatic weld inclusion weld toughness
分类号:
TG444.2
DOI:
10.19291/j.cnki.1001-3938.2019.9.003
文献标志码:
A
摘要:
为了详细研究高钢级管线钢自保护药芯焊丝半自动焊焊缝韧性波动的原因,选取了工业生产的3种X80自保护药芯焊丝和5种壁厚18.4 mm的X80钢板,通过正交组合后进行焊接评定试验,并采用光学金相、扫描电镜等手段对15种焊缝中的夹杂物进行了详细的定性和定量分析,结果显示:X80自保护药芯焊丝半自动焊缝内自根部向上夹杂物数量和尺寸逐渐减少;夹杂物颗粒细小,平均颗粒尺寸在0.4 μm左右,最大颗粒尺寸控制在2.0 μm以下;夹杂物类型主要是以A12O3为主的球形复合氧化物,没有观测到多边形AlN尤其是大颗粒夹杂物的存在。研究结果表明,X80自保护环焊缝夹杂物控制水平较理想,夹杂物并不会对冲击韧性造成不利影响。
Abstract:
In order to study the cause of the toughness fluctuation of semi-automatic flux-cored wire for high-grade pipeline steel, three X80 flux-cored wires and five X80 steel plates with 18.4 mm wall thickness produced in industry were selected. After orthogonal combination, the welding evaluation test was carried out, and 15 kinds of weld inclusions were analyzed qualitatively and quantitatively by means of optical metallography and scanning electron microscopy. The results show that the number and size of inclusions in the semi-automatic weld of X80 self-shielded flux-cored wire gradually decrease from the root to the top. The inclusion particles are tiny, the average particle size is about 0.4 μm, and the maximum particle size is controlled below 2.0 μm. The types of inclusions are mainly spherical composite oxides with A12O3 as the main component. No polygonal AlN, especially large inclusions, has been observed. The results show that the inclusion control level of X80 self-shielded girth weld is ideal, and the inclusions will not adversely affect the impact toughness.

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备注/Memo

备注/Memo:
收稿日期:2019-05-22
基金项目: 国家重点研发计划“低温高压服役条件下高强度管线用钢”(项目编号2017YFB0304900)。
作者简介:童 帅(1991—),硕士,工程师,研究方向为材料性能表征。
更新日期/Last Update: 2019-10-24